*As for everything else, so for a
mathematical theory: beauty can be perceived but not explained.*
— Arthur Cayley

Math is hard. But the Internet is a beautiful thing.

- Eric Weisstein's World of Mathematics
- FSU's math library
- The MacTutor History of Mathematics archive
- Math Forum @ Drexel

- Multivariable Calculus
- Elements of Abstract and Linear Algebra
- Linear Algebra
- The Hyperbook of Combinatorics
- The Trillia Group's textbooks are freely available for self-stufy.

Think you're good at math? Prepare to be humbled.

*Last update: 2009-07-12*